An example of gravitational potential energy is the energy of: a. any chemical
b. any object at a height
c. all moving objects.

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Why does lightning travel from clouds to the ground?